If I didn't work nights, I'd watch both. Temporarily at least, I don't watch either.
"Better wrestling", to me, is beside the point. The "best" MMA isn't on TV, the "best" food isn't in Restaurants, and on and on. For the market share WWE dominates, they do a great job. They're entertaining.....TNA is not.
Watching TNA, to me, is like watching Women's Volleyball on ESPN2: it's must-see TV for about 7 minutes, then i forget why I'm watching it, then i remember again, then i go do something for 10 minutes, then watch again, etc.